Reinforcement bar support

ABSTRACT

A two-piece chair bar support comprising a support piece having three wires forming a saddle to receive and support a chair bar, said wires extending outwardly and downwardly to also support a helical wire segment on the inside of said wires, and a base having three legs, inwardly of said helical segment, each having a plurality of undulations, said helical segment engaged in said undulations and said legs interconnected at the points of upper and lower triangular frame members; said support and base pieces adjustable by relative rotation thereof with said helical strip segment in said undulations.

United States Patent Albert M. Seppala 92 Granite St., Rodtport, Mass.01966 844,091

July 23, 1969 June 22, 1971 {72] lnventor [21 1 Appl. No. [22] Filed[45] Patented [54] REINFORCEMENT BAR SUPPORT 10 Claims, 2 Drawing Figs.

[52] US. Cl 52/678, 52/689, 248/83, 248/157 [51] Int. E04c5/16, Fl6m 11/20 [50] Field 01 Search 52/677,

[56] References Cited UNITED STATES PATENTS 2,262,704 1 H1941 Tompkinset al.

w13,sss,773

2,281,946 5/l942 O'Neill Primary Examiner-Henry C. Sutherland AssistantExaminer-James l. Ridgill, Jr. Attorney-Charles C. Winchester 2ABSTRACT=A two-piece chair bar support comprising a suppon piece havingthree wires forming a saddle to receive and support a chair bar, saidwires extending outwardly and downwardly to also support a helical wiresegment on the inside of said wires, and a base having three legs,inwardly of said helical segment, each having a plurality ofundulations, said helical segment engaged in said undulations and saidlegs interconnected at the points of upper and lower triangular framemembers; said support and base pieces adjustable by relative rotationthereof with said helical strip segment in said undulations.

prior to its incorporation in a reinforced concrete structure.

More particularly this invention relates to a chair bar support known inthe trade as a high chair.

A principal object of this invention is to provide such a support whichis readily adjustable in height on a job site and which is sturdy andrugged in construction in order that reinforcing materials may belocated accurately in height as specified by the engineer or designer.Other objects are to provide a support; which, by virtue of itsadjustability minimizes the number of sizes which need to be stocked andthereby also minimizes the errors made by unskilled personnel inselecting the sizes; which is inherently stable; and, which is simpleand relatively inexpensive to manufacture.

in general the invention features a two-piece construction comprising abase piece and a support piece. A saddle on the support piece isprovided to support a bar. One of the pieces has a helical strip segmentsecured thereto. The other of the pieces has a plurality of legs eachhaving a plurality of undulations in which the helical strip segment isrotatably engaged. Thus, relative rotation of the two pieces causesadjustment axially of the helical segment. 1

Other objects, features and advantages of this invention will beapparent to those skilled in the art from the following detaileddescription of a preferred embodiment thereof taken together with theaccompanying drawing, in which:

FIG. 1 is a plan view of a high chair embodying the invention andsupporting a chair bar; and

FIG. 2 is a side elevation of the high chair shown in FIG. 1.

With reference to FIG. 2 of the drawings, a chair bar 30 is supported bya two-piece high chair comprising a support piece and a base piece 20.The high chair is of wire construction, the wire gauge selecteddepending upon the size of the high chair, heavier wire being used forlarger sizes as is present practice on other forms of high chairs.

The support piece 10, as best shown in FIG. 1, comprises three wires l2,14 extending radially outwardly from the vertical axis 32 of the supportat uniform 120 intervals. The wires 12, 14 are joined adjacent thesupport axis 32, wire 12 positioned between wires 14. At their positionof joinder the wires 12, 14 are bent to form a concave saddle 16 facingupwardly to receive and support chair bar 30. As they extend angularlydownwardly. At a predetermined equal distance from the support axis 32,the wires I2, 14 are bent downwardly, parallel to axis 32. A helicalwire strip segment 18 is joined to wires 12, 14 on the inner, lowerportions thereof. Helical wire strip segment 18 extends slightly morethan 1 revolution about the inner portion of support piece 10 beingconnected at two points to one wire 12 thereof but only once to each ofthe other wires 14 thereof.

Base 20 has three legs 22, the three legs providing excellent stability.The legs are equidistantly spaced about the support and extendvertically parallel the support axis 32. Each leg has a plurality ofundulations 24 facing outwardly toward helical segment 18. Legs 22 arespaced from axis 32 adjacent helical segment 18 with segment 18 engagedin undulations 24. For production convenience, the legs 22 are identicalto each other, having matching undulations 24, the helical strip segment18 therefore having a pitch permitting it to engage the next highestundulation in each leg 22 in a three-legged structure, i.e., a pitch perrevolution equal to three undulations. Legs 22 are interconnected byequilateral wire frame members 26 and 28 to which they are joined andwhich are triangular in shape for maximum strength. Lower frame member26 is connected at its points to the exterior sides of legs 22 toprevent spreading and upper member 28 is connected at its points to theinterior to prevent inward deflection as well as to avoid interferencewith support piece 10 and helical segment 18.

To assemble the support and base pieces, helical segment 18 is simplythreaded onto the undulations 24 of legs 22. Vertical adjustment maythen be made as desired by relatively rotating the two pieces 10, 20. Itmay be easier on the job site to rotate base piece 20 rather thansupport piece 10 if they are already in position supporting a bar 30. Tominimize the number of sizes of elements employed in a system ofsupports, all size variations may be vertical and may be embodied inbase pieces 20, all support pieces 10 being of unifonn size.

Other embodiments of this invention will occur to those skilled in theart which are within the spirit and scope of the following claims.

What I claim is:

I. An adjustable, two-piece support for bar stock to be incorporated ina reinforced concrete structure, comprising:

a base piece; and,

a support piece having a saddle for receiving and supporting bar stock;

one of said pieces having a helical segment of strip material supportedthereon about an axis;

the other of said pieces having adjacent said segment a plurality oflegs spaced about said axis and parallel thereto, said legs each havinga plurality of undulations therealong facing said segment; and I saidsegment extending between said legs, having circumferentially spacedportions in slidablc engagement with the undulations of each said leg,whereby said segment is rotatable relative to said legs, successive saidportions in one direction progressively along said segment being inengagement with undulations of each leg located at a different axialposition from the undulations engaged at adjacent legs by adjacentportions;

whereby axial adjustment of said saddle is accomplished by relativerotation of said base and support pieces.

2. The support claimed in claim 1 in which said legs are part of saidbase piece and said segment is part of said support piece.

3. The support claimed in claim I in which said legs have matchingundulations and the pitch of said helical segment is one undulation fromone leg to the next.

4.-The support claimed in claim 3 in which there are three said legsequidistantly spaced from and about said axis.

5. The support claimedin claim 4 in which said legs are part of saidbase piece and said segment is part of said support piece.

6. The support claimed in claim 5 in which said legs are positionedinwardly of said helical segment toward said axis and said helicalsegment is connected by means positioned outwardly therefrom to saidsaddle.

7. An adjustable, two piece support for bar stock to be incorporated ina reinforced concrete structure, comprising:

a base piece; and

a support piece having a saddle for receiving and supporting bar stock;

said support piece having a helical segment of strip material supportedthereon about an axis;

said bar piece having adjacent said segment a plurality of legs spacedabout said axis and parallel thereto, said legs each having a pluralityof undulations therealong facing said segment;

said legs being positioned inwardly of said helical segment toward saidaxis and said helical segment being connected by means positionedoutwardly therefrom to said saddle; and,

said segment in rotatable engagement with said undulations at adifferent axial position progressively in one direction at each legrelative to adjacent legs;

whereby axial adjustment of said saddle is accomplished by relativerotation of said base and support pieces.

8. The support of claim 1 wherein each said leg comprises a segmentconsisting of an undulating strip providing said plurality ofundulations.

9. The support claimed in claim 7 in which said legs are interconnectedby frame members comprising equilateral triangular forms said legsattached at the points of said frame members.

10. The support claimed in claim 9 in which one said frame member ispositioned at the base of and on the other side of mg UNITED STATESPATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 2 585 ,7??? DatedJune 22; 1.971

Inventor) Albert; M. Seppala It is certified that error appears in theabove-identified patent and that said Letters Patent are herebycorrected as shown below:

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Sljarrmd and sealed this 26th day cf October- 1971! Antest:

1M}; 3%.) M P" LEJFGEBIR J R HOB-123W! GO'PFi-EUHA [4K xtLesatingOfficer Acting (Sommissiuner of Patents

1. An adjustable, two-piece support for bar stock to be incorporated ina reinforced concrete structure, comprising: a base piece; and, asupport piece having a saddle for receiving and supporting bar stock;one of said pieces having a helical segment of strip material supportedthereon about an axis; the other of said pieces having adjacent saidsegment a plurality of legs spaced about said axis and parallel thereto,said legs each having a plurality of undulations therealong facing saidsegment; and said segment extending between said legs, havingcircumferentially spaced portions in slidable engagement with theundulations of each said leg, whereby said segment is rotatable relativeto said legs, successive said portions in one direction progressivelyalong said segment being in engagement with undulations of each leglocated at a different axial position from the undulations engaged atadjacent legs by adjacent portions; whereby axial adjustment of saidsaddle is accomplished by relative rotation of said base and supportpieces.
 2. The support claimed in claim 1 in which said legs are part ofsaid base piece and said segment is part of said support piece.
 3. Thesupport claimed in claim 1 in which said legs have matching undulationsand the pitch of said helical segment is one undulation from one leg tothe next.
 4. The support claimed in claim 3 in which there are threesaid legs equidistantly spaced from and about said axis.
 5. The supportclaimed in claim 4 in which said legs are part of said base piece andsaid segment is part of said support piece.
 6. The support claimed inclaim 5 in which said legs are positioned inwardly of said helicalsegment toward said axis and said helical segment is connected by meanspositioned outwardly therefrom to said saddle.
 7. An adjustable, twopiece support for bar stock to be incorporated in a reinforced concretestructure, comprising: a base piece; and a support piece having a saddlefor receiving and supporting bar stock; said support piece having ahelical segment of strip material supported thereon aboUt an axis; saidbar piece having adjacent said segment a plurality of legs spaced aboutsaid axis and parallel thereto, said legs each having a plurality ofundulations therealong facing said segment; said legs being positionedinwardly of said helical segment toward said axis and said helicalsegment being connected by means positioned outwardly therefrom to saidsaddle; and, said segment in rotatable engagement with said undulationsat a different axial position progressively in one direction at each legrelative to adjacent legs; whereby axial adjustment of said saddle isaccomplished by relative rotation of said base and support pieces. 8.The support of claim 1 wherein each said leg comprises a segmentconsisting of an undulating strip providing said plurality ofundulations.
 9. The support claimed in claim 7 in which said legs areinterconnected by frame members comprising equilateral triangular formssaid legs attached at the points of said frame members.
 10. The supportclaimed in claim 9 in which one said frame member is positioned at thebase of and on the other side of said legs and the other of said framemembers is positioned at the upper portion of and on the inner side ofsaid legs.